Bench-dog



(No Model.)

D. G. S. DAVIS.

- q BENCH DOG.

No. 364,491. Patented June '7, 1887.

L n. H .l

UNITED STATES PATENT OFFICE.

DANIEL G. S. DAVIS, OF EAST CANAAN, NEW HAMPSHIRE.

BENCH-DOG.

SPECIFICATION forming part of Letters Patent No 364,491, dated June 7, 1887.

- Application filed March SI, 1986. Serial No.197,27.'l. (No model.)

To aZZ 1072,0121, it may concern.-

Be it known that I, DANIEL G. S. DAVIS, of East Canaan, in the county of Grafton and State of New Hampshire, have invented a new and useful Improvement in Bench-Dogs, of which the following, taken in connection with the accompanying drawings, is aspecification.

The object of this invention is to furnish to carpenters, cabinetmakers, and other artisans who work at the bench a convenient adjustable bench clamp or dog for holding boards or other material firmly in position on the bench while being planed or otherwise operated upon.

By my improvement pieces of varying lengths are held by a powerful grip at both ends, and when finished on one side can be quickly released, turned, and again clamped tightly or removed, and one of different slze substituted, the apparatus being adapted to a wide range of work.

My invention consists in a bench-clam p having a horizontal base-piece which may be adjustable longitudinally to various posltlons on the bench, and provided with means for securing it temporarily when adjusted, in combination with a vertical and horizontal jaw having a sliding movement on the base-piece, and adapted to be clamped against the board by a cam-lever or equivalent device, while the other end of the board is held by a suitable sto J.

1 11 the drawings, Figure 1 is a front view of my improved clamp applied to a carpenters bench, Fig. 2 showing the position of the parts when pressure has been relaxed and the sliding jaw moved farther away from the stationary one. Fig. 3 is a rear view of the clamp, showing the bench broken away; and Flg. 41s a detail showing a modified form of jaw and lever.

A represents the bench formed with several holes, B, through its front face, to receive studs 0, of corresponding form, pro ecting from the back side of the base-piece D of the clamp. The holes B are at specified distances from each other, and the pins or studs 0 correspond thereto, so that the base-piece may be applied to the front of the bench at any desired point. These studs are roughened-preferably screwthreaded for better adhesion when slipped into the holes, and one of them passes through a slot, E, in the base-piece, so that it may have a slight movement toward the other stud under the pressure of a canrlever, F, pivoted at G and acting on the nut H, through which the threaded stud 0 passes. This construction is best shown in Fig. 3, and it serves to grip the base-piece D firmly to the bench and to permit its ready readjustment thereon.

A sliding clamp of peculiar construction is.

may slide freely along the base-piece until the jaw J strikes the end of the board or timber to be held,the lever M being thrown up, as in Fig. 2, and the jaw tilted slightly back on its pivot L.

the upper part of the jaw J forward, so as to somewhat penetrate the piece to be held and draw it slightly downward, this latter tendency being increased by beveling or cutting away obliquely the lower edge of the horizontal portion of the jaw which projects over the top of the bench.

Thejaw is shown as made in two parts, the front portion, J, slotted, as at R, to receive setscrews S S, which engage in threads formed in the rear part. By this means the jaw may be adjusted vertically to bring its horizontal portion at any desired height above the top of the bench. In the modification shown in Fig. 4 the vertically-adj ustable part J of the jaw has an angular shank fitting into a similarlyshaped socket in the part J, and held at the desired height by a single set-screw, S. The lever M has also a curved slot to receive a shouldered stud, P, which, passing through the slot 0, connects the lever to the jaw J.

A suitable stop or holdfast, T, fixed to the bench at one end, cooperates with the clamping devices described. I prefer the form By now depressing the lever M its pin P works in the oblique slot 0 and forces shown in the drawings, which is so similar to the clamp already referred to as to need no detailed description, since it has the base-piece, cam-lever, and vertically-adjustable jaw with 5 oblique edge. It is, however, obvious that a different or simpler form of stop may be substituted, if desired, and *I do not limit myself in this respect. Neither do I confine my invention to the removable or adjustable base- 10 piece D, since it is obvious one may be made running the full length of the bench, thus re quiring no adjustment.

I claim as my invention The combination,with stop T and base-piece DANIEL G. S. DAVIS.

\Vitnesses:

J ENNIE S. CLARK, Lnonnm) DAyIs, 

